Pneumatic needle type single-grain precision seeder

Abstract

The invention discloses a pneumatic needle type single-grain precision seeder which comprises a walking power device, a spiral ridging device, a main rack, a driving device, a seed metering device, aseed guide device, a soil covering device, a pair of land wheels and a fan; the seed guide device comprises a pair of star wheel discs, a seed guide shaft, a middle wheel shaft, hanging basket shafts,a double-row seed guide chain wheel and control cams; each star wheel disc comprises a disc end cover, a planetary wheel disc and a planetary gear train; the pair of double-row seed guide chain wheels are respectively fixed on the disc end covers to drive the star wheel discs to rotate; a plurality of hanging baskets are uniformly distributed on each hanging basket shaft in the axial direction, the opening and closing ends of the hanging baskets are always kept in a vertically downward state while the hanging baskets rotate around a central shaft, and the control cams with the same number asthe hanging baskets are uniformly distributed on the seed guide shaft in the axial direction; and by adopting the planet wheel dibbling type full-constraint seed guide principle, the full constraint with the local freedom degree can be realized in the process from the time when seeds leave a seed suction needle to the time when the seeds fall into seedbed soil for seed guide and transportation, the bounce and slippage of the seeds and the seedbed soil are reduced, the seed feeding precision is high, and the seeding quality is good.

Description

technical field [0001] The invention belongs to the technical field of sowing in agricultural machinery, and in particular relates to a pneumatic needle type single-grain precision seeder. Background technique [0002] With the rapid advancement of agricultural modernization, agricultural mechanization, as a necessary condition and driving force for the sustainable development of agriculture in my country, has developed rapidly in recent years. Mechanized seeding is the primary link and weak link of agricultural mechanization. Precision seeding is an advanced form of mechanized sowing. It is to accurately sow qualified seeds into the seed ditch according to the sowing rate and row spacing required by agronomy, cover with an appropriate amount of soil and suppress it, so as to realize mechanized intensive cultivation and ensure uniform distribution of seed row spacing. Consistent sowing depth, creating a good environment for plant groups to use light, temperature, water, fert...

AI Technical Summary

Problems solved by technology

The Chinese patent with the application number 201620464977.3 discloses a ditching profiling pneumatic precision seeder suitable for vegetable planting, which is driven by a three-point tractor suspension, soil loosening shovel, furrowing plow, and air suction disc seed metering device , pressing and shaping rollers and other working parts can complete loosening, ditching, sowing, and pressing and shaping at one time after the tractor is driven. , high energy consumption, not suitable for small-scale fields and vegetable greenhouses, and the movement of seeds after leaving the seed meter is random, and it is impossible to achieve uniform, orderly and accurate transportation of seeds into the soil, and it is difficult to ensure the uniformity of particle distance

The Chinese patent with the application number 201920484801.8 announced an electric air-suction needle type Panax notoginseng precision seeder for field operations. The seed hole is pressed out by the pressure hole roller, which replaces the traditional ditching sowing operation method and reduces soil disturbance. The air-suction needle type The reciprocating swing of the seed meter realizes single-grain seed picking and seeding operation, and the pressing wheel suppresses to complete the sowing operation. On the premise of ensuring the seeding density, uniform grain spacing and consistent sowing depth are realized. However, this free seeding method is easily affected by the ground. Unevenness or machine vibration, etc., affect the accuracy of seed migration during the seeding process

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